diff -r 000000000000 -r 6474c204b198 widget/nsIDragSession.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/nsIDragSession.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,89 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+#include "nsITransferable.idl"
+
+
+%{ C++
+#include "nsSize.h"
+%}
+
+native nsSize (nsSize);
+
+
+interface nsIDOMDocument;
+interface nsIDOMNode;
+interface nsIDOMDataTransfer;
+
+[scriptable, uuid(fde41f6a-c710-46f8-a0a8-1ff76ca4ff57)]
+interface nsIDragSession : nsISupports
+{
+  /**
+    * Set the current state of the drag, whether it can be dropped or not.
+    * usually the target "frame" sets this so the native system can render the correct feedback
+    */
+  attribute boolean canDrop;
+
+  /**
+   * Indicates if the drop event should be dispatched only to chrome.
+   */
+  attribute boolean onlyChromeDrop;
+  
+  /**
+    * Sets the action (copy, move, link, et.c) for the current drag 
+    */ 
+  attribute unsigned long dragAction;
+  
+  /**
+    * Sets the current width and height of the drag target area. 
+    * It will contain the current size of the Frame that the drag is currently in
+    */  
+  [noscript] attribute nsSize targetSize;
+ 
+  /**
+    * Get the number of items that were dropped
+    */
+  readonly attribute unsigned long numDropItems;
+  
+  /**
+    * The document where the drag was started, which will be null if the
+    * drag originated outside the application. Useful for determining if a drop
+    * originated in the same document.
+    */
+  readonly attribute nsIDOMDocument sourceDocument;
+
+  /**
+    * The dom node that was originally dragged to start the session, which will be null if the
+    * drag originated outside the application.
+    */
+  readonly attribute nsIDOMNode sourceNode;
+
+  /**
+   * The data transfer object for the current drag.
+   */
+  attribute nsIDOMDataTransfer dataTransfer;
+
+  /**
+    * Get data from a Drag&Drop. Can be called while the drag is in process
+    * or after the drop has completed.  
+    *
+    * @param  aTransferable the transferable for the data to be put into
+    * @param  aItemIndex which of multiple drag items, zero-based
+    */
+  void getData ( in nsITransferable aTransferable, in unsigned long aItemIndex ) ;
+
+   /**
+    * Check to set if any of the native data on the clipboard matches this data flavor
+    */
+  boolean isDataFlavorSupported ( in string aDataFlavor ) ;
+  
+};
+
+
+%{ C++
+
+%}